Is walking as exercise "good enough"?

I've been in a perpetual cycle of introducing new PT exercises that only amp up my pain and put me in bed. I can't seem to get any traction on doing any exercises or stretches that will help me build up stability.

So, I had a thought about dialing things back, like way back. What if the only exercise I do is... walk? Just walk. No QL stretches, no Big 3, no child's pose, no bridges, no this, no that. Just walk.

Is that "good enough"? I'm not looking to become a powerlifter, I just want to be able to get in and out of bed without wincing.